diff --git a/.mise.toml b/.mise.toml
index 1fbb2d0..f7a1dd9 100644
--- a/.mise.toml
+++ b/.mise.toml
@@ -35,7 +35,7 @@ rust = [
   { version = "nightly", components = "rust-src,rustfmt", targets = "wasm32-unknown-unknown" },
 ]
 typos = "latest"
-uv = "latest"
+uv = "0.11.8"
 yq = "latest"
 zig = "latest"
 
@@ -157,7 +157,7 @@ description = "Build the har1 workflow WASM module"
 dir = "services/ws-modules/har1"
 run = """
 wasm-pack build . --target web
-yq eval-all -i 'select(fileIndex == 0) * select(fileIndex == 1)' pkg/package.json package.json
+cargo run -p module-manifest-to-package-json
 """
 
 [tasks.build-ws-face-detection-module]
@@ -165,7 +165,7 @@ description = "Build the face detection workflow WASM module"
 dir = "services/ws-modules/face-detection"
 run = """
 wasm-pack build . --target web
-yq eval-all -i 'select(fileIndex == 0) * select(fileIndex == 1)' pkg/package.json package.json
+cargo run -p module-manifest-to-package-json
 """
 
 [tasks.build-ws-comm1-module]
@@ -234,7 +234,7 @@ description = "Build the pydata1 Python workflow module"
 dir = "services/ws-modules/pydata1"
 run = """
 uv build --wheel --out-dir pkg
-cargo run -p pyproject-to-package-json
+cargo run -p module-manifest-to-package-json
 """
 
 [tasks.build-ws-pyface1-module]
@@ -242,7 +242,7 @@ description = "Build the pyface1 Python face detection workflow module"
 dir = "services/ws-modules/pyface1"
 run = """
 uv build --wheel --out-dir pkg
-cargo run -p pyproject-to-package-json
+cargo run -p module-manifest-to-package-json
 """
 
 [tasks.build-ws-java-data1-module]
diff --git a/Cargo.lock b/Cargo.lock
index 75a8a40..254194a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2038,6 +2038,15 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "module-manifest-to-package-json"
+version = "0.1.0"
+dependencies = [
+ "serde",
+ "serde_json",
+ "toml",
+]
+
 [[package]]
 name = "multimap"
 version = "0.10.1"
@@ -2481,15 +2490,6 @@ dependencies = [
  "prost",
 ]
 
-[[package]]
-name = "pyproject-to-package-json"
-version = "0.1.0"
-dependencies = [
- "serde",
- "serde_json",
- "toml",
-]
-
 [[package]]
 name = "qr2term"
 version = "0.3.3"
diff --git a/Cargo.toml b/Cargo.toml
index fbc2d2c..2ee9119 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ members = [
   "services/ws-wasm-agent",
   "utilities/cli",
   "utilities/onnx",
-  "utilities/pyproject-to-package-json",
+  "utilities/module-manifest-to-package-json",
 ]
 resolver = "2"
 
diff --git a/services/ws-modules/face-detection/Cargo.toml b/services/ws-modules/face-detection/Cargo.toml
index 53f0206..952a66c 100644
--- a/services/ws-modules/face-detection/Cargo.toml
+++ b/services/ws-modules/face-detection/Cargo.toml
@@ -9,6 +9,10 @@ repository.workspace = true
 [lib]
 crate-type = ["cdylib", "rlib"]
 
+[package.metadata.ws-module.dependencies]
+et-model-face1 = "*"
+onnxruntime-web = "*"
+
 [dependencies]
 et-web.workspace = true
 et-ws-wasm-agent = { path = "../../ws-wasm-agent" }
diff --git a/services/ws-modules/face-detection/package.json b/services/ws-modules/face-detection/package.json
deleted file mode 100644
index f272815..0000000
--- a/services/ws-modules/face-detection/package.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "dependencies": {
-    "et-model-face1": "*",
-    "onnxruntime-web": "*"
-  }
-}
diff --git a/services/ws-modules/har1/Cargo.toml b/services/ws-modules/har1/Cargo.toml
index 259c753..3eeb782 100644
--- a/services/ws-modules/har1/Cargo.toml
+++ b/services/ws-modules/har1/Cargo.toml
@@ -9,6 +9,9 @@ repository.workspace = true
 [lib]
 crate-type = ["cdylib", "rlib"]
 
+[package.metadata.ws-module.dependencies]
+et-model-har-motion1 = "*"
+
 [dependencies]
 et-web.workspace = true
 et-ws-wasm-agent = { path = "../../ws-wasm-agent" }
diff --git a/services/ws-modules/har1/package.json b/services/ws-modules/har1/package.json
deleted file mode 100644
index 89a6482..0000000
--- a/services/ws-modules/har1/package.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "dependencies": {
-    "et-model-har-motion1": "*"
-  }
-}
diff --git a/utilities/cli/src/lib.rs b/utilities/cli/src/lib.rs
index ee7053e..f87aa95 100644
--- a/utilities/cli/src/lib.rs
+++ b/utilities/cli/src/lib.rs
@@ -81,6 +81,29 @@ struct PyprojectWsModule {
     dependencies: BTreeMap<String, String>,
 }
 
+#[derive(Debug, Default, Deserialize)]
+struct CargoPackage {
+    package: Option<CargoPackageMetadata>,
+}
+
+#[derive(Debug, Default, Deserialize)]
+struct CargoPackageMetadata {
+    name: Option<String>,
+    metadata: Option<CargoMetadata>,
+}
+
+#[derive(Debug, Default, Deserialize)]
+struct CargoMetadata {
+    #[serde(rename = "ws-module")]
+    ws_module: Option<CargoWsModule>,
+}
+
+#[derive(Debug, Default, Deserialize)]
+struct CargoWsModule {
+    #[serde(default)]
+    dependencies: BTreeMap<String, String>,
+}
+
 #[derive(Debug, Clone)]
 struct ModuleRegistryEntry {
     mise_path: String,
@@ -855,7 +878,8 @@ fn module_package_json(module_path: &Path) -> Option<PackageJson> {
     let pkg_package = read_package_json(&module_path.join("pkg/package.json"));
     let root_package = read_package_json(&module_path.join("package.json"));
     let pyproject = read_pyproject_package(&module_path.join("pyproject.toml"));
-    if pkg_package.is_none() && root_package.is_none() && pyproject.is_none() {
+    let cargo_package = read_cargo_package(&module_path.join("Cargo.toml"));
+    if pkg_package.is_none() && root_package.is_none() && pyproject.is_none() && cargo_package.is_none() {
         return None;
     }
 
@@ -874,6 +898,14 @@ fn module_package_json(module_path: &Path) -> Option<PackageJson> {
             package.name = pyproject.project.and_then(|project| project.name);
         }
     }
+    if let Some(cargo_package) = cargo_package.and_then(|cargo_package| cargo_package.package) {
+        if let Some(ws_module) = cargo_package.metadata.and_then(|metadata| metadata.ws_module) {
+            package.dependencies.extend(ws_module.dependencies);
+        }
+        if package.name.is_none() {
+            package.name = cargo_package.name;
+        }
+    }
     Some(package)
 }
 
@@ -887,6 +919,11 @@ fn read_pyproject_package(path: &Path) -> Option<PyprojectPackage> {
     toml::from_str(&content).ok()
 }
 
+fn read_cargo_package(path: &Path) -> Option<CargoPackage> {
+    let content = fs::read_to_string(path).ok()?;
+    toml::from_str(&content).ok()
+}
+
 fn resolve_module_paths<F>(
     registry: &BTreeMap<String, ModuleRegistryEntry>,
     module_names: &[String],
diff --git a/utilities/cli/src/tests.rs b/utilities/cli/src/tests.rs
index 03c4c76..e6a9d90 100644
--- a/utilities/cli/src/tests.rs
+++ b/utilities/cli/src/tests.rs
@@ -103,6 +103,33 @@ onnxruntime-web = "*"
     );
 }
 
+#[test]
+fn module_package_json_reads_cargo_ws_module_dependencies() {
+    let test_root = tempdir().unwrap();
+    let module_dir = test_root.path().join("rust-module");
+    fs::create_dir_all(&module_dir).unwrap();
+    fs::write(
+        module_dir.join("Cargo.toml"),
+        r#"[package]
+name = "et-ws-rust-module"
+version = "0.1.0"
+edition = "2024"
+
+[package.metadata.ws-module.dependencies]
+et-model-har-motion1 = "*"
+"#,
+    )
+    .unwrap();
+
+    let package = module_package_json(&module_dir).unwrap();
+
+    assert_eq!(package.name.as_deref(), Some("et-ws-rust-module"));
+    assert_eq!(
+        package.dependencies.get("et-model-har-motion1").map(String::as_str),
+        Some("*")
+    );
+}
+
 #[test]
 fn regenerate_verification_generates_all_deployment_types() {
     let test_root = tempdir().unwrap();
diff --git a/utilities/pyproject-to-package-json/Cargo.toml b/utilities/module-manifest-to-package-json/Cargo.toml
similarity index 59%
rename from utilities/pyproject-to-package-json/Cargo.toml
rename to utilities/module-manifest-to-package-json/Cargo.toml
index dc02c11..00696da 100644
--- a/utilities/pyproject-to-package-json/Cargo.toml
+++ b/utilities/module-manifest-to-package-json/Cargo.toml
@@ -1,13 +1,13 @@
 [package]
-name = "pyproject-to-package-json"
-description = "Generate pkg/package.json from a Python ws-module's pyproject.toml"
+name = "module-manifest-to-package-json"
+description = "Generate pkg/package.json from ws-module project metadata"
 version = "0.1.0"
 edition.workspace = true
 license.workspace = true
 repository.workspace = true
 
 [[bin]]
-name = "pyproject-to-package-json"
+name = "module-manifest-to-package-json"
 path = "src/main.rs"
 
 [dependencies]
diff --git a/utilities/module-manifest-to-package-json/src/main.rs b/utilities/module-manifest-to-package-json/src/main.rs
new file mode 100644
index 0000000..b17b937
--- /dev/null
+++ b/utilities/module-manifest-to-package-json/src/main.rs
@@ -0,0 +1,143 @@
+use std::collections::BTreeMap;
+use std::fs;
+use std::path::{Path, PathBuf};
+
+use serde::Deserialize;
+use serde_json::{Map, Value, json};
+
+#[derive(Deserialize)]
+struct Project {
+    name: String,
+    version: String,
+    description: Option<String>,
+    license: Option<String>,
+}
+
+#[derive(Deserialize)]
+struct WsModule {
+    #[serde(rename = "js-main")]
+    js_main: String,
+    #[serde(default)]
+    dependencies: BTreeMap<String, String>,
+}
+
+#[derive(Deserialize)]
+struct Tool {
+    #[serde(rename = "ws-module")]
+    ws_module: WsModule,
+}
+
+#[derive(Deserialize)]
+struct Pyproject {
+    project: Project,
+    tool: Tool,
+}
+
+#[derive(Deserialize)]
+struct CargoPackage {
+    package: CargoPackageMetadata,
+}
+
+#[derive(Deserialize)]
+struct CargoPackageMetadata {
+    name: String,
+    metadata: Option<CargoMetadata>,
+}
+
+#[derive(Deserialize)]
+struct CargoMetadata {
+    #[serde(rename = "ws-module")]
+    ws_module: Option<CargoWsModule>,
+}
+
+#[derive(Deserialize)]
+struct CargoWsModule {
+    #[serde(default)]
+    dependencies: BTreeMap<String, String>,
+}
+
+fn main() {
+    let out_path = PathBuf::from("pkg/package.json");
+    let package_json = if Path::new("pyproject.toml").is_file() {
+        package_json_from_pyproject()
+    } else if Path::new("Cargo.toml").is_file() {
+        package_json_from_cargo(&out_path)
+    } else {
+        panic!("Expected pyproject.toml or Cargo.toml in the current directory");
+    };
+
+    fs::create_dir_all(out_path.parent().unwrap()).unwrap();
+    let mut out = serde_json::to_string_pretty(&package_json).unwrap();
+    out.push('\n');
+    fs::write(&out_path, &out).unwrap_or_else(|e| panic!("Failed to write {}: {e}", out_path.display()));
+
+    println!("Wrote {}", out_path.display());
+}
+
+fn package_json_from_pyproject() -> Value {
+    let pyproject_path = PathBuf::from("pyproject.toml");
+    let pyproject: Pyproject = read_toml(&pyproject_path);
+    let p = &pyproject.project;
+    let mut pkg = Map::from_iter([
+        ("name".to_string(), json!(p.name)),
+        ("type".to_string(), json!("module")),
+        ("description".to_string(), json!(p.description.as_deref().unwrap_or(""))),
+        ("version".to_string(), json!(p.version)),
+        ("license".to_string(), json!(p.license.as_deref().unwrap_or(""))),
+        ("main".to_string(), json!(pyproject.tool.ws_module.js_main)),
+    ]);
+    if !pyproject.tool.ws_module.dependencies.is_empty() {
+        pkg.insert("dependencies".to_string(), json!(pyproject.tool.ws_module.dependencies));
+    }
+    Value::Object(pkg)
+}
+
+fn package_json_from_cargo(out_path: &Path) -> Value {
+    let cargo_toml: CargoPackage = read_toml(Path::new("Cargo.toml"));
+    let mut pkg = read_package_json(out_path).unwrap_or_else(|| {
+        let mut pkg = Map::new();
+        pkg.insert("name".to_string(), json!(cargo_toml.package.name));
+        pkg.insert("type".to_string(), json!("module"));
+        pkg
+    });
+
+    if !pkg.contains_key("name") {
+        pkg.insert("name".to_string(), json!(cargo_toml.package.name));
+    }
+
+    let Some(ws_module) = cargo_toml.package.metadata.and_then(|metadata| metadata.ws_module) else {
+        return Value::Object(pkg);
+    };
+
+    if !ws_module.dependencies.is_empty() {
+        let dependencies = pkg
+            .entry("dependencies".to_string())
+            .or_insert_with(|| Value::Object(Map::new()));
+        let dependency_map = dependencies
+            .as_object_mut()
+            .unwrap_or_else(|| panic!("{} contains a non-object dependencies field", out_path.display()));
+        for (name, version) in ws_module.dependencies {
+            dependency_map.insert(name, json!(version));
+        }
+    }
+
+    Value::Object(pkg)
+}
+
+fn read_toml<T>(path: &Path) -> T
+where
+    T: for<'de> Deserialize<'de>,
+{
+    let src = fs::read_to_string(path).unwrap_or_else(|e| panic!("Failed to read {}: {e}", path.display()));
+    toml::from_str(&src).unwrap_or_else(|e| panic!("Failed to parse {}: {e}", path.display()))
+}
+
+fn read_package_json(path: &Path) -> Option<Map<String, Value>> {
+    let src = fs::read_to_string(path).ok()?;
+    let Value::Object(pkg) =
+        serde_json::from_str(&src).unwrap_or_else(|e| panic!("Failed to parse {}: {e}", path.display()))
+    else {
+        panic!("{} must contain a JSON object", path.display());
+    };
+    Some(pkg)
+}
diff --git a/utilities/pyproject-to-package-json/src/main.rs b/utilities/pyproject-to-package-json/src/main.rs
deleted file mode 100644
index dbebe3a..0000000
--- a/utilities/pyproject-to-package-json/src/main.rs
+++ /dev/null
@@ -1,64 +0,0 @@
-use std::collections::BTreeMap;
-use std::fs;
-use std::path::PathBuf;
-
-use serde::Deserialize;
-use serde_json::{Map, Value, json};
-
-#[derive(Deserialize)]
-struct Project {
-    name: String,
-    version: String,
-    description: Option<String>,
-    license: Option<String>,
-}
-
-#[derive(Deserialize)]
-struct WsModule {
-    #[serde(rename = "js-main")]
-    js_main: String,
-    #[serde(default)]
-    dependencies: BTreeMap<String, String>,
-}
-
-#[derive(Deserialize)]
-struct Tool {
-    #[serde(rename = "ws-module")]
-    ws_module: WsModule,
-}
-
-#[derive(Deserialize)]
-struct Pyproject {
-    project: Project,
-    tool: Tool,
-}
-
-fn main() {
-    let pyproject_path = PathBuf::from("pyproject.toml");
-    let src = fs::read_to_string(&pyproject_path)
-        .unwrap_or_else(|e| panic!("Failed to read {}: {e}", pyproject_path.display()));
-
-    let pyproject: Pyproject = toml::from_str(&src).unwrap_or_else(|e| panic!("Failed to parse pyproject.toml: {e}"));
-
-    let p = &pyproject.project;
-    let mut pkg = Map::from_iter([
-        ("name".to_string(), json!(p.name)),
-        ("type".to_string(), json!("module")),
-        ("description".to_string(), json!(p.description.as_deref().unwrap_or(""))),
-        ("version".to_string(), json!(p.version)),
-        ("license".to_string(), json!(p.license.as_deref().unwrap_or(""))),
-        ("main".to_string(), json!(pyproject.tool.ws_module.js_main)),
-    ]);
-    if !pyproject.tool.ws_module.dependencies.is_empty() {
-        pkg.insert("dependencies".to_string(), json!(pyproject.tool.ws_module.dependencies));
-    }
-    let pkg = Value::Object(pkg);
-
-    let out_path = PathBuf::from("pkg/package.json");
-    fs::create_dir_all(out_path.parent().unwrap()).unwrap();
-    let mut out = serde_json::to_string_pretty(&pkg).unwrap();
-    out.push('\n');
-    fs::write(&out_path, &out).unwrap_or_else(|e| panic!("Failed to write {}: {e}", out_path.display()));
-
-    println!("Wrote {}", out_path.display());
-}